Iridodialysis is a tearing away of the periphery of the iris. This operation is rarely done and only when the extreme margin of the cornea is the only clear portion.
Iridavulsion.- Removal of the entire iris by tearing it from its periphery has been performed with remarkable effect by Noyes in cases of hydrophthalmus. The iris should be seized by the forceps or hook at its periphery opposite to the point of opening of the cornea and drawn out. Care must be taken not to injure the lens.
Corelysis.- The breaking of pupillary adhesions by the hook or toothless forceps has not proved a great success, owing to their tendency to re-form and the danger of wounding the lens.
Iridodesis consist in drawing the pupillary edge of the iris through a small opening in the margin of the cornea and securing it by a fine silk suture on the outside. The operation was formerly practiced by Critchett and others, but has fallen into disuse from the possible danger of sympathetic ophthalmia.